Island



Oct. 28, 1924. r 1,512,900

A. BERGERON vALvE oasnm'me MECHANISM Filed March 22', 1922 Patented Get. 28, 192.4.

orrics.

ALFRED BERGER/ON, F WOQDTSOCKET, RHODE ISLAND.

VALVE-OBEIEt-ATING MECHANISM.

Application filed March 22, 1922. Serial No. 545,741.

To all whom it may concern:

Be it known that I, ALFRED BERGERON, a citizen of the United States, residing at Woonsocket, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Valve-Operating Mechanism, of which the following is a specification The present invention relates more particularly to the means for taking up the necessary play or lost motion that is found necessary between the actuating rod and the valve of an internal combustion engine of the type employing a rocker arm between the two. As is well known. a certain amount of lost motion is necessary in order to allow for the expansion of the valve stem, and as a consequence there is apt to be noise occasioned bv the striking of the parts together.

The object of the present invention is to provide means which will maintain all the parts in contact, and yet allow for the necessary elongation of the same.

In the accompanying drawings Figure 1 is a side elevation of a well known type of valve mechanism, with the improvements applied thereto.

Figure 2 is a longitudinal sectional view through the lever or rocker arm mounting.

Figure 3 is a v ew of the fulcrum head at right angles to Figure 2,

Figure 4 is a bottom plan view of the he d shown in Figure 3.

Figure 5 is a bottom plan view of the post element,

Figure 6 is a side elevation of the looking nut.

In the embodiment disclosed. a valve of well known type is shown at 7. and is provided with a stem 8 surrounded b the usual closing spring 9. This stem bears against one end of a rocker arm or lever 10. the other end of which is borne a ainst by the usual valve actuating rod 11. So far as thus disclosed the structure is well known in the art.

The lever 10 is fulcrumed between its ends on a mounting designate generallv by the reference numeral 12. This mounting includes a base 13 having an upstanding sleeve 14 in which is adiustably threaded a socket element 15 having an angular head 16. by which it may be turned. A look nut 17 threaded on the exterior of the slee e 14, is adapted to abut against the head 16 and prevent its accidental rotation. A post element consists of a head 19 having a journal pin 20 on which the lever 10 is fulcrumed and this head carries a depending stem 21 that is slidably mounted in the socket element. It is held against turning by a screw key 22 threaded through the head 16 and engaging in any one of a number of grooves 23 formed in the lower end. of the head 19. The lower end of the stem 21. is enlarged. as shown at 24, and is longitudinally split, as illustrated at 25, the slits tapering upwardly as illustrated. Any number of these slits may be provided, as desired. The upper surface of the enlarged portion 24, is tapered, as shown at 26, and bears against the inwardly tapered surface 27 formed on the lower end of the socket element 15. The lower end of the bor in which the post is slidably mounted may be closed by a plug 28 and an oil port 29 formed in the head 16 communicates with one of the grooves 23.

lVith this structure it is to be understood that the actuating rod 11 has at all times contact with the end of the lever or rocker arm 10 and that said lever or rocker arm 10' is in constant contact with the valve stem 8. Because of these bearings there is therefore no noise in operation and if a change takes place by reason of the elongation of the valve 8. for instance, the post member of the mounting will be moved upwardly. This will take place against the yielding resistance caused by the sliding bearing of the surface 26 against the surface 27 and the compression of the lower end of the post element. A reverse action obviously will take place if the valve stem contracts for the resilient lower end of the post will react and expand. causing the movement downwardly of the post and thus maintaining the bearing between the valve actuating parts.

From the foregoing. it is thought that the construction. operation and many advantages of the herein described invention w ll be apparent to those skilled in the art. without further description, and it will be understood that various changes in the size, shape, proportion and minor details of construction, may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is I e 1. The combination with an actuated member and an actuating member therefor.

of a motion transmitting lever interposed between the members, a post on which the lever is fulcrumed, a mounting in which the post is slidably engaged, said post having its inner end in the form of a longitudinally split yielding and compressible head, and. a socket element adjustable in the mounting and surrounding the post, said socket element having its inner end bearing against the head and being slidably borne against by saidhead to compress the same and'thereby ofler yielding resistance to the sliding movement of the post.

2. The combination with an actuated member and an atuatiI-ig manner, of a motii'in t'ransr'nitting meiiiber' comprising a lever fulcrumed between its ends and having said end Hearing respectively against the actuating and actuated members, and a mounting for said lever comprising a base having a socket provided with a tapered bearing surface and a post on which the lever is fulcrumed, said post having a-spli-t spring end provided with inclined surfaces bearing against the tapered surface of the socket.

In testimony whereof, I afiix my signature.

ALFRED BERGERON. 

